package com.itheima.security;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.SysUser;
import com.itheima.service.UserService;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

import java.util.ArrayList;
import java.util.List;

/**
 * @author mengwei
 * @date 2019/8/21
 * @desc
 */
public class SecurityConfigUserService implements UserDetailsService {

    @Reference
    UserService userService;

    /**
     * 根据username获取用户信息
     * @param username
     * @return
     * @throws UsernameNotFoundException
     */
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //根据用户名获取用户信息
        SysUser sysUser = userService.findUserByUsername(username);
        if (sysUser == null){
            return null;
        }

        List<GrantedAuthority> authorityList = new ArrayList<>();
        for (Role role : sysUser.getRoles()) {
            for (Permission permission : role.getPermissions()) {
                SimpleGrantedAuthority grantedAuthority =
                        new SimpleGrantedAuthority(permission.getKeyword());
                authorityList.add(grantedAuthority);
            }
        }

        User user = new User(sysUser.getUsername(),
                sysUser.getPassword(), authorityList);
        return user;
    }
}
